RADIAL DEPENDENCE OF THE NUCLEON EFFECTIVE-MASS IN B-10

The dynamic properties of the atomic nucleus depend strongly on correl ations between the nucleons. We present a combined analysis of inelast ic electron-scattering data and electron-induced proton knockout measu rements in an effort to obtain phenomenological information on nucleon -nucleon correlations. Our results indicate that the ratio of radial w ave functions extracted from precise B-10(e, e') and B-10(e, e'p) meas urements evolve from an interior depression for small E-m, characteris tic of short-range correlations, to a surface-peaked enhancement for l arger E-m, characteristic of long-range correlations. This observation can be interpreted in terms of the nucleon effective mass.